I am buying a 1972 Renault 4TL - do I need to use a fuel additive with this motor? | Ask Honest John

Selling your classic car? It's FREE to list your car on Honest John Classics | No thanks

I am buying a 1972 Renault 4TL - do I need to use a fuel additive with this motor?

I am buying a 1972 Renault 4TL. Do I need to use a fuel additive with this motor?

Asked on 24 July 2019 by Martin Langwade

Answered by Keith Moody

Ask the current owner if he's been using an additive. With no lead in fuel, many owners were worried about valve seat recession - but to be honest, the low mileages done by classics mean that this is less of a problem. What tends to cause issues is the octane rating of fuel so you may find that your Renault 4 runs better on a high-octane fuel or with an octane booster.

Tags: classic cars fuel honest john classics fuel additives

Similar questions

Does supermarket fuel have 'lower capability' additives?

I have been advised that petrol additives are actually added during fuel station delivery. Non-branded stations, such as supermarkets, receive fewer or or lower capability additives which is partly why...

Do I need an E5 additive for my classic Daimler?

I am fortunate to have and look after a 1969 Daimler Sovereign (420). I am having to use E5 fuel and would appreciate your guidance on which additive(s) would help protect the Jaguar XK engine? I believe...

Should I use E10 fuel in a classic car?

I'm now coming across contradictory information regarding the use of E10 fuel in classic car engines. I was under the impression that it was a big no no due to the higher ethanol content absorbing water...

Related models